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US 10,294,889 B2Granted
Engine
AssigneePolaris Industries Inc.
InventorsBret Allen Oltmans, Brian J. Hitt, David Andrew Galsworthy, Chad Michael Slater, Daniel Joseph Nugteren, George Jay McKoskey, Gordon Raymond Nelson
Life of this patent
Estimating the term…
Abstract
An engine is described having a crankcase, a liner and a head assembly. The crankcase is split along a plane defining a two part crankcase, where fluid passages are passing through only one of the crankcase portions, so as to not require crossing the split line. A connecting rod also includes a tapered end, and the piston has a complementary carrier receiving the connecting rod.
Claims27
An engine, comprising:
- a crankcase defined between first and second spaced apart and opposing inner walls;
- a crankshaft journalled in the crankcase, and extending along a rotational axis;
- a piston coupled to the crankshaft;
- a cylinder in which the piston reciprocates, and
- a head positioned over the piston and cylinder;
- the crankcase being physically split along a plane forming first and second crankcase portions, the plane being transverse to the rotational axis, intermediate the first and second opposing inner walls, and intersecting the piston, the split defining first and second mating faces on the first and second crankcase portions, spaced from the first and second opposing inner walls, the first and second crankcase portions being coupled together at the first and second mating faces, with fluid passages being in only the first crankcase portion, the fluid passages communicating with the head to deliver fluid to the head, the fluid passages including at least one oil passage.
3 more elements
An engine, comprising:
- a crankcase comprising a plurality of walls, including first and second spaced apart and opposing walls, and a third wall coupling the first and second walls and having an opening therethrough extending along a reciprocation axis;
- a crankshaft journalled in the crankcase, and extending along a rotational axis, the rotational axis being transverse to the reciprocation axis;
- a piston coupled to the crankshaft through the opening, and being movable along the reciprocation axis;
- a cylinder in which the piston reciprocates, and
- a head positioned over the opening and receiving the piston;
- the crankcase being physically split along a plane forming first and second crankcase portions, the plane being transverse to the rotational axis and extending through the opening defining complementary opening portions, the crankcase further comprising fluid passages communicating with the head to deliver fluid to the head, with the fluid passages being in only the first crankcase portion.
3 more elements
Dependencies are inferred from the claim text.